davidson



2 SheetsSheet 1.

(No Model.)

T. DAVIDSON. ORE GONGENTRATOR 0R MINERAL SAVING MACHINE.

Patented Jan. 16, 189.4.

(No Model.) 2 sheets sheet 2.

T. DAVIDsON. ORE GONCENTRATOR OR MINERAL SAVING MACHINE. No. 512,811. Patented Jan. 16, 1894.

, I wifnsssss Inventor I fiamms NAnuNAL LrmoGRAPuma COMPANY.

UNITED STATES PATENT OFFICE.

THOMAS DAVIDSON, OF MOUNT BRYDGES, CANADA.

ORE-CONCENTRATOR OR MINERAL-SAVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 512,811, dated January 16, 1894.

Application filed September 26, 1892. Serial No.446,866- (No model.)

To and whom it may concern.-

Be it known that I, THOMAS DAVIDSON, a subject of the Queen of Great Britain, and a resident of Mount Brydges, in the Province of Ontario, Canada, have invented a new and useful Ore-Concentrator or Mineral-Saving Machine, of which the following is a full, clear, and exact description.

This invention relates to a machine for separating the mineral from the crushed rock or gangue; and it consists of the improved construction and combination of parts of the same, as will be hereinafter first fully set forth and then pointed out in the claims.

In the accompanying drawings,Figure 1 is a side elevation of the machine in a tank, one side of the tank being removed to show the machine more clearly therein. Fig. 2. is a central, longitudinal sectional view of a portion of same; in this view, a side elevation of the ridge bar, shaft, supports and valve is shown. Fig. 3. is a cross sectional View of the machine on the line, a, C6, of Fig. 1. Fig. 4. is a cross sectional view of the machine, on the line, b, b, of Fig. 1. Figs. 5. and, 6. are plan views of a portion of the upper and lower sieves respectively.

A, designates a shaft or axle; B, B, standards or upright end frame pieces, in which the shaft or axle, A, is supported, and in which it oscillates perfectly free; 0, a casing, rigidly secured to the casing, J; D, conical ribs se-' cured to the under side of said casing, G, for the purpose of cutting the water, and thereby reducing the friction of said casing, C, when oscillating in the water contained in the tank,

E; E, a water tank, filled to about the dotted line, n, and formed with the overflow pipe, F, the discharge pipe, G, and the chute, H, the pipe, G, being provided with a valve, 1, shown in Fig. 1. to regulate the discharge of the mineral as required.

J, designates a casing, which is rigidly secured to the shaft or axle, A, which casing is semicircular in cross section, as shown in Fig. 4, and inclined lengthwise as shown in Fig. 2, and formed with the elongated inlet and outlet openings, K, L, with the discharge pipe, h, with the door, 2, in the cover, and the inlet and outlet chutes, f, g, respectively, at the ends thereof. The door, 2, in the cover,,is for the purpose of examining the condition of the contents of the casin g, J, and to permit access to the valve handle, 6, in order to adjust the valve, 0.

M, N, designate sieves, or screens, which are placed in the casing, J, as shown in Figs. 2, and 4. The upper sieve, M, is not only inclined from the sides downward to the center, as will be seen by applying a straight edge to it in Fig. 4, but is inclined upward toward the outlet openings, L, and is formed with the central longitudinal perforations, O, and the cross perforations, P, the latter formed about one foot from the outlet of the machine, as shown in Fig. 5. The lower sieve, N, is also inclined upward toward the outlet openings, L, and is formed with the longitudinal perforations, R, which extend from side to side over about one half of the sieve lengthwise, and also with the cross perforations, S, about midway between the perforations, R, and the outlet openings, L, as shown in Fig. 6.

T, designates a ridge bar, rigidly braced and secured to the shaft or axle, A.

U, designates a pitman, pivotally secured at one end to this ridge bar, T, and at the other end to the pulley, V, off the center, and

this pulley, V, is supported by, and revolves perfectly free on a'stud or shaft, W, rigidly secured to the standard or upright side frame piece, X, shown in' Fig. 3.

c, designates a valve, formed tubular at its lower end and provided with the openings, d, which communicate with the central tubular portion. This valve, 0, extends through the casing Jfand is provided with a water tight joint at this point, and it also extends up Ward through the sieves, N, M, and is formed with a screw thread, and is screwed into and through a screw threaded socket in the shaft or axle, A, and on the upper end of this valve, 0, is the handle, 6.

Before commencing the operation of this machine, turn the valve, 0, until the openings, 5

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lower sieve, N, is about three parts filled with mineral. Then open the valve, 0, by adjusting the openings, cl, therein, above the inner face of the casing, J, in proportion to the amount of mineral coming into the machine.

The operation is as follows; Motion is communicated to the pulley, V, by suitable means, and this pulley being connected with the shaft, A, and easing, J, as before described, and the pitman, U, being connected to the pulley, V, off the center, as said pulley revolves, the shaft, A, casing, J, and parts attached thereto, oscillate, in proportion to the distance that the end of the pitman, U, is from the center of the pulley, V. The crushed ore and water are received at the inlet chute, f, and pass through the inlet openings, K, into the casing, J, and on to the sieves, M, N, where the mineral portion is separated from the gangue, by the water and motion of the machine, and falls through on to the bottom of the casing, J, the gangue being carried by the water and motion of the machine, out of the casing, J, through the outlet openings, L, and down the chute, g, away from the machine; any gangue passing through the upper sieve, M, with the mineral, will also be carried by the water and motion of the machine, off through the openings, L. Again if any of the gangue should fall through the lower sieve, N, and on to the mineral resting in the casing, J, the water and motion of the machine would carry the gangue off through the discharge pipe, h, to a pail or other receptacle, placed at the end of the machine, to receive it 5 this pipe, 72., also serves as a means whereby the operator may ascertain the depth of the mineral deposit in the casing, J. The mineral passes from the casing, J, through the valve openings, (1, and falls on the chute, H, which conducts it to the discharge pipe, G, through which it passes to a receptacle, which collects the mineral, the water passing away. The openings, O, are formed centrally in the upper sieve, M, because, the mineral being the heaviest collects at this point, and because this sieve inclines slightly downward from the sides to the center, the gangue beinglighter, is carried by the water and motion of the machine, from side to side in a zig zag direction, and the sides of this sieve, M, being solid, the gangue is carried thereon toward, and out through the outlet openings, L; if any of the very light particles of mineral should be carried with the gangue to, and along on the side of the sieve, M, they would be met by the cross perforations, P, through which they would fall onto the sieve, N. The lower sieve, N, is formed with the perforations, R, from side to side, and about half of the distance lengthwise, because the main portion of the gangue is removed from the mineral, before it falls on the sieve, N, and the perforations, R, are formed as described, because there is a larger quantity of mineral than gangue, and a large number of openings, R, are required, to permit the mineral to readily pass through said sieve, N. If any of the mineral should be carried past the openings, B, it would be met bythe cross openings, S, through which it would fall to the bottom of the casing, J.

Having thus claim- 1. The shaft, A, and means for supporting and operating the same, in combination with the casing, J, formed with the inlet and outlet openings, K, L, and means for conducting the ore and water to, and the gangue and water from said casing, J, sieve, M, inclined from the sides downward to the center, and from the inlet upward to the outlet, and formed with the central longitudinal perforations, O, and the cross perforations, P, substantially as shown and described, and for the purpose specified.

2. The shaft, A, and means for supporting and operating the same, in combination with the casing, J, formed with theinlet and outlet openings, K, L, and means for conducting the ore and water to, and the gaugue and water from said casing, J, sieve, N, inclined from the inlet upward to the outlet, and formed with the longitudinal perforations, R, and the cross perforations, S, substantially as shown and described, and for the purpose specified.

3. The shaft, A, and means for supporting and operating the same, in combination with the casing, J, secured thereto, the sieve, M, inclined from the inlet upward toward the outlet, and formed with the central longitudinal perforations, O, and the cross perforations, P, the sieve, N, also inclined from the inlet upward toward the outlet, and formed with the longitudinal perforations, R and cross perforations, S, the inlet and outlet openings, K, L, formed in the ends of the casing, J, and the receiving and discharging chutes, f, 9, substantially as shown and described, and for the purpose specified.

4. The shaft, A, and means for supporting and operating the same, in combination with the casing, J, secured thereto, the sieve, M, inclined from the inlet upward toward the outlet, and formed with the central longitudinal perforations, O, and the cross perforations, P, the sieve, N, also inclined from the inlet upward toward the outlet, and formed with the longitudinal perforations R and cross perforations, S, the inlet and outlet openings, K, L, formed in the ends of the casing, J, the receiving and discharging chutes, f, g, and the valve, 0, substantially as shown and described and for the purpose specified.

5. The combination of the shaft, A, and means for supporting and operating the same, the casing, J, secured to said shaft, A, the screens, M, N, secured in said casing, J, the inlet and outlet openings, K, L, formed in the ends of the casing, J, the receiving and dis charging chutes, f, g, the valve, 0, the disdescribed my invention, I

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charge pipe, h, the casing, C, and the conical ribs, D, substantially as shown and described, and for the purpose specified.

6. The shaft, A, and means for supporting and operating the same, the casing, J, secured to said shaft, A, and provided with a door, Z, the screens, M, N, secured in said casing, J, the inlet and outlet openings, K, L, formed in the ends of the casing, J, the receiving and discharging chutes, f, g, the valve, 0, the discharge pipe, h, the casing, O, and the conical THOMAS DAVIDSON.

Witnesses:

P. J. EDMUNDS, S. MOBAIN. 

